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‎06-16-2025 12:31 AM

HP Recommended
Operating System: Microsoft Windows 11

Hello, I would like to add ram to my HP EliteDesk 805 G9 SFF desktop. There is 64GB (2 -32GB) currently installed, and 2 slots available. When I purchased the PC, the specs said the RAM capacity is 128 GB. I tried adding 2 more 32 GB DDR5-5600  UDIMM (Crucial) memory sticks to the other 2 slots but the machine won't boot up now. I then tried removing the original two memory modules and replace them with the crucial modules, in the same slots as the original ram, and it still won't boot up. 

According to the specs for that desktop, it comes with DDR5 5600 MHz ram installed. In fact, it appears that the installed RAM on the machine I purchased is noted as PC5 4800 32GB modules. I am trying to understand why the PC will not boot up at all when I install the DDR5-5600 ram modules - either with the others installed or not. Anyone have any ideas on that?

Thank you.

Ric

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